Transportation between Shanghai and Yellow Mountains?

Hi, we're going to the Huangshan from 27 May until 30 May from Shanghai. Do you know which bus we can take to get there and how much that bus would cost? We are also staying in the Beihai Hotel on the mountain. Do you know how to reach that hotel from below the mountain, which cable car do we need to take etc.? We hope you can help us with this. Thanks in advance!